<template>
  <div class="todo-footer">
    <label>
      <input type="checkbox" @click="checkedChange" :checked="comchecked"/>
    </label>
    <span> <span>已完成{{(
      todoList.reduce((p,c)=>{return c.done?p+1:p},0)
      )}}
      </span> / 全部{{todoList.length}} </span>
    <button class="btn btn-danger" @click="clearOver">清除已完成任务</button>
  </div>
</template>
  
<script>
export default {
  name: "Footer",
  props:["todoList","Allchnecked","clearOver"],
  computed:{
      comchecked(){
        return this.todoList.every(item=>item.done)&&this.todoList.length !==0
      }
  },
  methods:{
    checkedChange(e){
      this.Allchnecked(e.target.checked)
    },
  }
};
</script>

<style scoped>
/*footer*/
.todo-footer {
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}

.todo-footer label {
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input {
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
}
</style>